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Stereomicroscope

a stereoscopic and microscope technology, applied in the field of stereoscopic microscopes, can solve the problems of narrow observation range, degrade resolution, and affect the performance of stereoscopic vision, and achieve the effect of wide working range and lateral dimension of the observation lens barrel at the top

Active Publication Date: 2008-07-24
OLYMPUS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0033]According to the present invention, the stereomicroscope in which the lateral dimension of the observation lens barrel at the top can be minimized and a wide working range of a viewer can be ensured is obtained.

Problems solved by technology

However, that the internal inclination angle made by the right and left observation optical systems is made small becomes advantageous in reducing the lateral dimension of the observation lens barrel, but it impairs the performance of stereoscopic vision and thus is unfavorable.
Further, that the field angle of each observation optical system is made small becomes advantageous in reducing the lateral dimension of the observation lens barrel, but it narrows an observation range and thus is unfavorable.
Still further, that the NA of each observation optical system is made small becomes advantageous in reducing the lateral dimension of the observation lens barrel, but it darkens an observation image obtained through the observation optical system to degrade resolution and thus is unfavorable.

Method used

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Examples

Experimental program
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embodiment 1

[0085]FIG. 8 shows a schematic arrangement of the stereomicroscope according to Embodiment 1 of the present invention. FIG. 9 shows a part of the stereomicroscope of FIG. 8. FIG. 10 shows the arrangement of the top of the stereomicroscope of FIG. 8. FIGS. 11A-11C show optical arrangements of the observation optical system of the stereomicroscope according to Embodiment 1 of the present invention. FIG. 12 shows a part of an optical arrangement near the imaging plane in the observation optical system of the stereomicroscope of FIGS. 11A-11C. Also, in FIGS. 11A-11C, only one optical system is conveniently shown with respect to optical systems for right and left eyes.

[0086]In the optical system for the right eye, “R” is attached to a corresponding reference numeral, while in the optical system for the left eye, “L” is attached. Reference symbol FIR (FIL) represents the position of the final imaging plane. These are also used in individual embodiments.

[0087]The stereomicroscope of Embodi...

embodiment 2

[0126]FIGS. 16A-16C show optical arrangements of the observation optical system of the stereomicroscope according to Embodiment 2 of the present invention. Also, in FIGS. 16A-16C, only one optical system is conveniently shown with respect to the stereomicroscope provided with optical systems for right and left eyes. In the illumination optical system of the stereomicroscope of Embodiment 2, as in Embodiment 1, the illumination optical system shown in any of FIGS. 13, 14, and 15 is applicable, and its explanation is eliminated.

[0127]The stereomicroscope of Embodiment 2 is constructed so that the observation optical system comprises, in order from the object side, the single objective lens system 1; the afocal relay optical system 2R (2L) which is one of a pair of right and left afocal relay optical systems; the variable magnification optical system 3R (3L) which is one of a pair of right and left variable magnification optical systems; the aperture stop 4R (4L) which is one of a pair...

embodiment 3

[0141]FIGS. 17A-17C show optical arrangements of the observation optical system of the stereomicroscope according to Embodiment 3 of the present invention. Also, in FIGS. 17A-17C, only one optical system is conveniently shown with respect to the stereomicroscope provided with optical systems for right and left eyes. In the illumination optical system of the stereomicroscope of Embodiment 3, as in Embodiment 1, the illumination optical system shown in any of FIGS. 13, 14, and 15 is applicable, and its explanation is eliminated.

[0142]The stereomicroscope of Embodiment 3 is constructed so that the observation optical system comprises, in order from the object side, the single objective lens system 1; a single afocal relay optical system 2; the variable magnification optical system 3L (3R) which is one of a pair of right and left variable magnification optical systems; the aperture stop 4L (4R) which is one of a pair of right and left aperture stops; and the imaging lens system 5L (5R) ...

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Abstract

A stereomicroscope has, in order form the object side, a single objective lens system; afocal relay optical systems, each including a front lens unit with positive refracting power and a rear lens unit with positive refracting power and having an intermediate image between the front lens unit and the rear lens unit; variable magnification optical systems; a plurality of aperture stops including at least aperture stops for right and left eyes, located at positions decentered from the optical axis of the objective lens system; and a plurality of imaging lens systems located at positions corresponding to the plurality of aperture stops. In this case, when each of the variable magnification optical systems lies at the low-magnification position, an entrance pupil of an optical system ranging from the objective lens system to each of the imaging lens systems is located closest to the objective lens system to satisfy the following condition:0<L—enp—w / f—ob<0.3 where L_enp_w is a distance from the most object-side surface of the objective lens system where a working distance is shortest to the entrance pupil at the low-magnification position and f_ob is the focal length of the objective lens system where the working distance is shortest.

Description

[0001]This application claims benefits of Japanese Application No. 2007-4914 filed in Japan on Jan. 12, 2007, the contents of which are incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]This invention relates to a stereomicroscope, and in particular, to a stereomicroscope used as a surgical microscope.[0004]2. Description of Related Art[0005]Stereomicroscopes are used in wide fields of researches, examinations, and surgical operations because minute parts of observation objects can be captured as three-dimensional images.[0006]In the stereomicroscope, it is desired as one of main requirements to ensure a wide working space of a viewer. In particular, in the surgical microscope, besides ensuring a long working distance (WD) in order to obtain a working space for viewers (a chief operator and assistants), it is important to reduce a lateral dimension of an observation lens barrel. Specifically, in the surgical microscope, the viewer can e...

Claims

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Application Information

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IPC IPC(8): G02B21/22
CPCG02B21/22
Inventor UZAWA, TSUTOMUNAMII, YASUSHI
Owner OLYMPUS CORP